Bidens aristosa (Michx.) Britt.
This article was produced by the USDA Forest Service, Forest Health Staff, Newtown Square, PA. WOW 01-21-05. Invasive Plants website.
Bearded beggarticks, swamp marigold, tickseed sunflower, longbracted beggar-ticks
A naturalized invasive plant of the United States
An upright annual or shortlived perennial in the aster family (Asteraceae) growing to a height of 1-5 feet and having slender, leafy, branched stems bearing several golden yellow, daisy-like flower heads. Leaves are approximately 6 inches long, opposite, pinnately divided, and segments toothed. Flowers head are 1-2 inches wide blooming August-October. Seed-like fruits are flat, ovoid, usually with 2 barbed spines.
Wet meadows, roadside ditches, abandoned fields, low ground, open bottomlands, stream banks, and other damp areas such as ditches.
This species is reported from states shaded on Plants Database map.
The prickly fruit are known as beggars'-ticks with 2-pronged "stickers" that cling to clothing in autumn. This species spreads to displace native plant species.
Control and Management
Manual - Mow to prevent encroachment.
Chemical - It can be effectively controlled using any of several readily available general use herbicides such as glyphosate, dicaba, or picloram. Follow label and state requirements.
- http://plants.usda.gov ,
- http://www.enature.com/fieldguide , www.invasive.org ,
- Mid Atlantic Plant Council List, www.forestryimages.org
Bearded Beggarticks. U.S. Forest Service.